摘要
以半干旱半湿润区的柳林流域为例,基于无人机三维倾斜摄影7 cm高分辨率和ASTER 30m两种数字高程模型(DEM)数据源,重采样获得1 m、5 m、10 m、20 m、30 m分辨率共10套DEM,构建HEC-HMS水文模型,选择1995—2021年20场洪水进行模拟,探讨DEM数据源和分辨率对洪水模拟精度的影响。结果表明:7 cm高分辨率地形数据源的1 m重采样DEM构建的模型,模拟结果相对较好,洪峰流量、径流量相对误差绝对值均值分别为16.4%和15.7%,NSE均值为0.657;ASTER 30m DEM构建的模型,洪峰流量、径流量相对误差绝对值均值分别为16%和18.7%,NSE均值为0.646,其他分辨率和数据源的DEM构建的模型,洪水过程模拟结果也差别不大。
This study constructs a HEC-HMS model to simulate flood hydrographs to examine the effect of DEM data sources and resolutions on the simulations.We take an ASTER 30 m digital elevation model(DEM)and unmanned aerial vehicle(UAV)3D tilt photography 7 cm high-resolution DEM as the data sources,and obtain ten DEMs with the resolutions of 1m,5m,10m,20m and 30m by resampling.This method has been applied to 20 flood events in the semi-arid and sub-humid Liulin watershed of the 1995-2021 period.The results show that the model constructed by the 1m resampling DEMs from the 7 cm high-resolution data sources has relatively good performance;its mean relative errors are 16.4%and 15.7%for flood peak flow and runoff depth simulations,respectively,with a mean NSE value of 0.657.For the ASTER 30 m DEMs-based model,its errors are 16.0%and 18.7%and its mean NSE value is 0.646.The other DEMs-based HEC-HMS models,featured with different resolutions and data sources,show little difference in flood simulations.
作者
李建柱
李磊菁
张婷
康彦付
张博
冯平
LI Jianzhu;LI Leijing;ZHANG Ting;KANG Yanfu;ZHANG Bo;FENG Ping(State Key Laboratory of Hydraulic Engineering Simulation and Safety,Tianjin University,Tianjin 300350,China;Hydrological Survey and Research Center of Xingtai City,Hebei Province,Xingtai 054000,China)
出处
《水力发电学报》
CSCD
北大核心
2023年第3期26-40,共15页
Journal of Hydroelectric Engineering
基金
国家自然科学基金(52279022)。
